Charmed Baryon Weak Decays with Vector Mesons

Abstract

We give a systematic study of ${\mathbf{B}}_c\to {\mathbf{B}}_{n}V$ decays, where ${\mathbf{B}}_c$ and ${\mathbf{B}}_n$ correspond to the anti-triplet charmed and octet baryons, respectively, while $V$ stand for the vector mesons. We calculate the color-symmetric contributions to the decays from the effective Hamiltonian with the factorization approach and extract the anti-symmetric ones based on the experimental measurements and $SU(3{)}_F$ flavor symmetry. We find that most of the existing experimental data for ${\mathbf{B}}_c\to {\mathbf{B}}_{n}V$ are consistent with our fitting results. We present all the branching ratios of the Cabbibo allowed, singly Cabbibo suppressed and doubly Cabbibo suppressed decays of ${\mathbf{B}}_c\to {\mathbf{B}}_{n}V$. The decay parameters for the daughter baryons and mesons in ${\mathbf{B}}_c\to {\mathbf{B}}_{n}V$ are also evaluated. In particular, we point out that the Cabbibo allowed decays of ${\Lambda }_c^{+}\to {\Lambda }^0{\rho }^{+}$ and ${\Xi }_c^0\to {\Xi }^{-}{\rho }^{+}$ as well as the singly Cabbibo suppressed ones of ${\Lambda }_c^{+}\to {\Lambda }^0{K}^{\ast +}$, ${\Xi }_c^{+}\to {\Sigma }^{+}\varphi$ and ${\Xi }_c^0\to {\Xi }^{-}{K}^{\ast +}$ have large branching ratios and decay parameters with small uncertainties, which can be tested by the experimental searches at the charm facilities.

arXiv comment23 pages, no figure

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• Charmed Baryon Physics Circa 2021
• Rescattering mechanism of weak decays of double-charm baryons
• Final-state rescattering mechanism of charmed baryon decays
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• Nonleptonic two-body weak decays of ${\Lambda }_b$ in modified MIT bag model
• Observation of the Singly Cabibbo-Suppressed Decay ${\Lambda }_c^{+}\to n{\pi }^{+}$
• A self-consistent framework of topological amplitude and its $SU(N)$ decomposition
• Partial wave analysis of the charmed baryon hadronic decay ${\Lambda }_c^{+}\to \Lambda {\pi }^{+}{\pi }^0$
• Time-reversal asymmetries and angular distributions in ${\Lambda }_b\to \Lambda V$
• Nonleptonic three-body charmed baryon weak decays with H(15)
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• Generation of $SU(3)$ sum rule for charmed baryon decay
• Measurements of branching fractions and asymmetry parameters of ${\Xi }_c^0\to \Lambda {\bar{K}}^{\ast 0}$, ${\Xi }_c^0\to {\Sigma }^0{\bar{K}}^{\ast 0}$, and ${\Xi }_c^0\to {\Sigma }^{+}{K}^{\ast -}$ decays at Belle
• Measurement of the branching fraction of ${\Lambda }_c^{+}\to p\omega$ decay at Belle
• Generation of isospin sum rules in heavy hadron weak decays
• Isospin sum rules in charmed baryon weak decays
• Malaria Parasitic Detection using a New Deep Boosted and Ensemble Learning Framework
• Measurement of the branching fractions of the decays ${\Lambda }_c^{+}\to \Lambda K_S^0{K}^{+}$, ${\Lambda }_c^{+}\to \Lambda K_S^0{\pi }^{+}$ and ${\Lambda }_c^{+}\to \Lambda K^{\ast +}$
• Quark model relations for b-baryon decay
• Weak decays of bottom-charm baryons: ${\mathcal{B}}_{bc}\to {\mathcal{B}}_{b}P$